Scroll bending apparatus



Aug, 25, 1953 v||. R. LEHMAN SCROLL BENDING APPARATUS 2 sheets-sheet 1Fiied Nov. 21. 195o INVEN TOR. HENRY E. LEHMM A TTOENEYS.

Aug. 25, 1953 Filed Nov. 21, 1950 H. R. LEHMAN 2,649,887

SCROLL BENDING APPARATUS' 2 sheets-sheet 2' Patented ug. 275, 41953TsNTfoFFlcE SCROLL BENDING APPARATUS Henry R. Lehman, Greenville,Miss'.l v Application November 21, 17950, Serial No. 196,867

y 1 Claim.

'Ihis invention relates to machines for bending scrolls into spiralshape from metal strips, and more particularly to an implementl forbending straight strips of iron into spiral shape.

A main object of the invention is to provide a novel and improvedmachine for bending strips of iron into spiral shape for ornamentalpurposes, said machine being simple in construction, being easy tooperate, and involving relatively few parts.

A further object of the invention is to provide an improved implementfor bending strip metal into spiral shape, said implement beinginexpensive to manufacture, being rugged in construction, providingsmoothly curved spiral coils in the strip of iron being bent, andproviding a means of forming ornamental iron scrolls in the field in vaminimum amount of time and by the use of la minimum amount of labor,

Further objects and advantages of the invention will become apparentfrom the following description and claim, and from the accompanyingdrawings, wherein:

Figure l is rear elevational view of an improved scroll-bending machineconstructed in accordance with the present invention;

Figure2 is a bottom plan view of the scrollbending machine o-f Figure 1,the handle portion of the machine being shown in fragmentary view;

Figure 3 is a cross-sectional view taken on line 3 3 of Figure2; A i

Figure 4 is a rear elevational view of the machine of Figure 1 with thearticulated lsegments of the die element shown in open positionsv andwith the lanvil element of the machine shown in its initial position atthe beginning of a scrollbending operation. y

Referringto the drawings, v.I I designates a support member which maybe, for example, a tubular, horizontal bar fixed to any suitablestationary structure.

Designated ,at I2 is a curved arm which is pivoted at I3 to the supportI I for rotation in a vertical plane. The pivotal connection of the armI2 may consist of a transverse shaft secured to arm I2 and journaled ina suitable transverse bearing sleeve I4 secured in the support II.Secured to the opposite end of said transverse shaft is a sector plateI5 having the spaced peripheral Ynotches I5. Pivoted at I1 to the sectorplate I5 is a hand lever I8 provided with a spring-biased locking dog I9slidably mounted thereon and lockingly engageable between .adjacentnotches I5. The lever I8 is provided with the conventional hand-releasearm 20 pivoted thereto which is connected to the locking dog I9 andwhich is arranged to disengage said locking dog from the notchedperiphery of sector plate I5 responsive to clockwise rotation of the arm20, as viewed in Figure 3. As shown, the arm I2 is provided at it-sconvex surface with Ia grooved seat 2I defining a channel forV receivinga strip of metal to be bent, as will presently be described.

Secured in the support I I parallel to the sleeve I4 and spacedtherefrom is a bearing sleeve 22 in which is journaled a transverseshaft 23. Secured to the end of the shaft adjacent the .arm I2 is anarticulated spira1 die member, designated generally at 24. The diemember 24 comprises an inner spiral segment 25 rigidly secured to theend of shaft 23 and having a further spiral segment 21 pivotallyconnected thereto at 26. The connection atf26 comprises respective plateelements 28 welded to the opposite sides of the end of segment 25 vwhichreceive between them the end of segment 21 and which are pivotallysecured to said segment by a hinge pin. Pivotally secured to the outerend of segment 21 in a similar manner is afurther spiral segment 29shaped to define a continuation of the spiral curve of segments 25 and21. The end of the inner segment 25 is'formed with an abutment surface3U against Ywhich the adjacent end of segment 21 is engaged when thesegments are arranged infoperating position, as shown in Figure 1, andthe segment 21 is provided at its outer end with an abutment surface 3lIagainst which the adjacent end of segment 29 is engaged when die member24 is in the operative position of Figure 1. However, the segments 29and 21 may be swung outwardly from the operative position shown inFigure 1, as is illustrated in Figure 4. The positions of said segments,shown in Figure 4, represent the starting position of the die member 24at the beginning of a scroll-bending operation. As shown, the innersegment 25 is formed with ya recess 32 shaped to receive the ends of ametal strip to be bent, such as the metal strip 33 shown in Figure 4.

It will be noted that the hinge connections 26 and 34 are diametricallyopposite each other relative to the axis of the shaft 23, and that theinner segment 25 extends substantially 180 around said axis.

It will further be noted that the convex, longitudinally grooved seat 2|of the anvil arm I2 is coplanar with and faces the peripheral outersurface of the spiral die member 24.

Secured to the shaft 23. as by engagement is a ratchet wheel 35.Designated at 36 is a Journaled on the end of shaft 23 ad- 40 providedwith a biasing spring4-I which urges the dog member 40 into interlockingengagement with the ratchet wheel 35 and which positively preventsratchet wheel 35 from rotating -clockwise relative to the dog 40, asviewed Yin YFigure 3. It will therefore be apparenttha't the ihandle bar38 transmits .torque to shaft ..23 'through the dog 40 and ratchet wheel"35 responsive to the counterclockwise rotation :of the handle bar 38relative toxsupport I I, as viewed in .Figure 3. The-shaft-231mayrotate.counterclock- 'wise relative to the .support I I, but clockwiserota-'tion of shaft -23 relative y.to .said support is prevented-bythe actionof the dogrmemberl 3S which is in .locking engagement with `the .rachet`Wheel 3.5.

In operation, the .meta-l strip .38 to be bent is :irstfforn'ied at .itsendsvwitha hook vportion 42, as shown in Figure 4, aand the hooked end`of the astri-p 33 is kengaged .inthe recess of theinner spiral diesegment 25. At this stage of the process, the segmentsl and29 `are intheir outwardly swung positions, as show-n .in Figure 4. With therhandle kbar 38 v.held Vso vthat Lthe segment .-25 is inthe 4position.shown in .Figure 4, the operator rotatesuthe hand lever 4I8 lto movethewcurved Varm l2 -into the ,position =shown Ain Figure 4, with the-end of the grooved anvil ele- -mentffl inabutment'with the Ystrip 33adjacent the 1100x412. The handlebar is then'rotated to curlthe-fstriparound .the inner segment 25 to form the innerportion of faspiralscroll. When .the stripvhas .-been curled around the segment V15,the .-next nsegment vZTI is 4disposed Iso -that its end-is `then in@abutment withfthe surface 30 of r .segment .2 5 'to denea ,continuation.ofi` the .spiral scroll. Rotation of the vdie member .is thencontinued, the .hand .lever I8 .being held .by the opertor .throughoutthe-bending operation and .ma-

.nipulatedby the voperator -to hold the convex member Y2l in .selectedrotative r.positionsand to adjust convex :member V2 I A.around its .axis.I3 vto increase theradial distanceof-.thesurface of said convex member2l from thefpivotalaxis .of the diemember. AAfter the strip has been-bentaround .the segment -2`I the .segment 29 lis moved into During thebending operation, the strip is received in the grooved anvil member 2Iand is held in the plane of the die member 24, thereby preventingtwisting of the strip during its bending into spiral coiled form. 'Iheposition of the hand lever I8 relative to the sector plate I5 may bevaried to suit the convenience of the user by disengaging the dog I9from interlocking engagement between the teeth IB by means of the arm210 and resettingthe leverrso yas "to provide the desired'relativesetting Aof 'the Alever with respect to the sector plate.

`While a specific embodiment of an improved scroll-bending implement hasbeen dis-closed in 'the foregoing description, it will be understoodthat various :modications within the spirit of the invention may occurto those skilled in the art. There'fora'it'isV intended that nolimitations be placed on the invention except as defined by the scope ofthe appended claim.

What is claimedis:

A scroll rbending .apparatus comprising a support, .an .anvil .memberpivo'tally secured to said support, means whereby said anvil member maybe held in .selected ,rotatedpositions relative to said support, .a.spiral-shaped articulated die member .pivoted to .said support adjacentsaid anvil .memben said .die .member beingformed of a irst .segmentpivot'ed to said support and a plurality ci additional segments, each ofwhich extends .through .substantially the ,outer peripheral surface ofthe die member facing the anvil vmemberandsaid die member being mountedfor .rotation in the :same ,plane as said anvil member, said .anvilmember having a convex surface .facing the outer peripheral surface ofthe die member and said anvil member being vadjustable varound Y.itspivotal axis by said irst named means 'to increase the radial distance`of convex sufface'rom the pivotalaxis -o'f said die member.

HENRY R.. LEI-IMAN.

References Cited in the le of this patent UNITED STAT-ES PATENTS NumberName yDate 224,526 Gag-e Feb. .17, '1880 292,418 Devine Jan. 22, 1884401,509 Mitchell .'Apr. 16 1889 413,330 schoonmaker Oct. 22,1889 725,026Boehm Apr. 14, 1903 772,157 Koehler Oct, 11, 1904 896,116 `JewettV Aug.18, 1908 1,627,604 -Hittle .May 10,1927 2,607,395 Petr-ille Aug. 19,1952 FOREIGN .PATENTS Number Country Date .10,854 AA.Great Britain .May.19, 1896

